Wow! @Calcyman and Helmut Postl take notice -- this is, shall we say, a bit smaller than a Basilisk.

(I haven't missed hearing about other new velocities in HighLife using this kind of replicator-based cleverness since 2013, have I? This seems very new and impressive to me, but sometimes it turns out I just wasn't paying attention.)

muzik wrote:Does this prove that all rules with a replicator and small natural spaceships have a less obvious family of adjustable spaceships?

This is in no wise a "proof"; while the technique applied is general enough, the specific ways in which replicators interact with other replicators and/or spaceships can allow or prohibit certain setups.
On a different note, these spaceships are considered engineerable, not adjustable, last I heard.

BlinkerSpawn wrote:On a different note, these spaceships are considered engineerable, not adjustable, last I heard.

My understanding was that people had kind of mostly agreed to never use "engineerable" again, because it was too confusing... so "adjustable" seems good. Might be worth tracking down remaining uses of "engineerable" in the LifeWiki --?

EDIT: Thanks for the wiki edit, muzik! I took out one more instance of "engineerable" but was careful to leave the "formerly known as..." mention of the term. Didn't want to do all that on my own -- it was entirely possible that it was just my own mental limitations that made me take ten minutes to figure out the difference between "engineered" and "engineerable", each time one of those terms was used.